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https://github.com/SerenityOS/serenity
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279383a8f3
This is a simple string class for use in the kernel. It encapsulates a length + character array in a single-allocation object. Main differences from AK::String: - Single-owner (no reference counting.) - Allocation failures are exposed, not hidden. The basic idea is to allow better and more precise string management in the kernel.
41 lines
1 KiB
C++
41 lines
1 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/KString.h>
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namespace Kernel {
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OwnPtr<KString> KString::try_create(StringView const& string)
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{
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char* characters = nullptr;
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size_t length = string.length();
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auto new_string = KString::try_create_uninitialized(length, characters);
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if (!new_string)
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return {};
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if (!string.is_empty())
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__builtin_memcpy(characters, string.characters_without_null_termination(), length);
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characters[length] = '\0';
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return new_string;
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}
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OwnPtr<KString> KString::try_create_uninitialized(size_t length, char*& characters)
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{
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size_t allocation_size = sizeof(KString) + (sizeof(char) * length) + sizeof(char);
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auto* slot = kmalloc(allocation_size);
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if (!slot)
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return {};
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auto* new_string = new (slot) KString(length);
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characters = new_string->m_characters;
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return adopt_own(*new_string);
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}
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OwnPtr<KString> KString::try_clone() const
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{
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return try_create(view());
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}
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}
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